Cant boot or install a rom.

Hey guys.
So ive wanted to intall a new rom , did the WeakSauce method and then got S-off.
After doing that downloaded the Viper rom , did a full wipe , and now every time i try to install it the phone start the install and stuck in the same place all the time :
Installing busybox
set_perm: some changed failed.

Also when in TWRP i get the msg : E: unable to mount /system.
When starting rom install (tried 3 roms , viper , coin , revolutionHD)
in all of them it state checking for md5 or some thing like that and then it fails and say skipped md5 and just continue to the install.
Iam not able to do any thing and iam also not able to boot the phone it stuck on the HTC logo.
The phone is M8 Verizon (s-off)
Please help !

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